diff --git a/apps/dokploy/__test__/env/environment-access-fallback.test.ts b/apps/dokploy/__test__/env/environment-access-fallback.test.ts
new file mode 100644
index 0000000000..a4b56393a5
--- /dev/null
+++ b/apps/dokploy/__test__/env/environment-access-fallback.test.ts
@@ -0,0 +1,294 @@
+import { describe, expect, it } from "vitest";
+
+// Type definitions matching the project structure
+type Environment = {
+	environmentId: string;
+	name: string;
+	isDefault: boolean;
+};
+
+type Project = {
+	projectId: string;
+	name: string;
+	environments: Environment[];
+};
+
+/**
+ * Helper function that selects the appropriate environment for a user
+ * This matches the logic used in search-command.tsx and show.tsx
+ */
+function selectAccessibleEnvironment(
+	project: Project | null | undefined,
+): Environment | null {
+	if (!project || !project.environments || project.environments.length === 0) {
+		return null;
+	}
+
+	// Find default environment from accessible environments, or fall back to first accessible environment
+	const defaultEnvironment =
+		project.environments.find((environment) => environment.isDefault) ||
+		project.environments[0];
+
+	return defaultEnvironment || null;
+}
+
+describe("Environment Access Fallback", () => {
+	describe("selectAccessibleEnvironment", () => {
+		it("should return default environment when user has access to it", () => {
+			const project: Project = {
+				projectId: "proj-1",
+				name: "Test Project",
+				environments: [
+					{
+						environmentId: "env-prod",
+						name: "production",
+						isDefault: true,
+					},
+					{
+						environmentId: "env-dev",
+						name: "development",
+						isDefault: false,
+					},
+				],
+			};
+
+			const result = selectAccessibleEnvironment(project);
+
+			expect(result).not.toBeNull();
+			expect(result?.environmentId).toBe("env-prod");
+			expect(result?.isDefault).toBe(true);
+		});
+
+		it("should return first accessible environment when user doesn't have access to default", () => {
+			// Simulating filtered environments (user only has access to development)
+			const project: Project = {
+				projectId: "proj-1",
+				name: "Test Project",
+				environments: [
+					// Note: production is not in the list because user doesn't have access
+					{
+						environmentId: "env-dev",
+						name: "development",
+						isDefault: false,
+					},
+					{
+						environmentId: "env-staging",
+						name: "staging",
+						isDefault: false,
+					},
+				],
+			};
+
+			const result = selectAccessibleEnvironment(project);
+
+			expect(result).not.toBeNull();
+			expect(result?.environmentId).toBe("env-dev");
+			expect(result?.name).toBe("development");
+		});
+
+		it("should return first environment when no default is marked but environments exist", () => {
+			const project: Project = {
+				projectId: "proj-1",
+				name: "Test Project",
+				environments: [
+					{
+						environmentId: "env-dev",
+						name: "development",
+						isDefault: false,
+					},
+					{
+						environmentId: "env-staging",
+						name: "staging",
+						isDefault: false,
+					},
+				],
+			};
+
+			const result = selectAccessibleEnvironment(project);
+
+			expect(result).not.toBeNull();
+			expect(result?.environmentId).toBe("env-dev");
+		});
+
+		it("should return null when project has no accessible environments", () => {
+			const project: Project = {
+				projectId: "proj-1",
+				name: "Test Project",
+				environments: [],
+			};
+
+			const result = selectAccessibleEnvironment(project);
+
+			expect(result).toBeNull();
+		});
+
+		it("should return null when project is null", () => {
+			const result = selectAccessibleEnvironment(null);
+
+			expect(result).toBeNull();
+		});
+
+		it("should return null when project is undefined", () => {
+			const result = selectAccessibleEnvironment(undefined);
+
+			expect(result).toBeNull();
+		});
+
+		it("should handle project with single accessible environment", () => {
+			const project: Project = {
+				projectId: "proj-1",
+				name: "Test Project",
+				environments: [
+					{
+						environmentId: "env-dev",
+						name: "development",
+						isDefault: false,
+					},
+				],
+			};
+
+			const result = selectAccessibleEnvironment(project);
+
+			expect(result).not.toBeNull();
+			expect(result?.environmentId).toBe("env-dev");
+		});
+
+		it("should prioritize default environment even when it's not first in the array", () => {
+			const project: Project = {
+				projectId: "proj-1",
+				name: "Test Project",
+				environments: [
+					{
+						environmentId: "env-dev",
+						name: "development",
+						isDefault: false,
+					},
+					{
+						environmentId: "env-staging",
+						name: "staging",
+						isDefault: false,
+					},
+					{
+						environmentId: "env-prod",
+						name: "production",
+						isDefault: true,
+					},
+				],
+			};
+
+			const result = selectAccessibleEnvironment(project);
+
+			expect(result).not.toBeNull();
+			expect(result?.environmentId).toBe("env-prod");
+			expect(result?.isDefault).toBe(true);
+		});
+
+		it("should handle multiple default environments by returning the first one found", () => {
+			// Edge case: multiple environments marked as default (shouldn't happen, but test it)
+			const project: Project = {
+				projectId: "proj-1",
+				name: "Test Project",
+				environments: [
+					{
+						environmentId: "env-prod-1",
+						name: "production-1",
+						isDefault: true,
+					},
+					{
+						environmentId: "env-prod-2",
+						name: "production-2",
+						isDefault: true,
+					},
+				],
+			};
+
+			const result = selectAccessibleEnvironment(project);
+
+			expect(result).not.toBeNull();
+			expect(result?.isDefault).toBe(true);
+			// Should return the first default found
+			expect(result?.environmentId).toBe("env-prod-1");
+		});
+
+		it("should work correctly when user has access to multiple environments including default", () => {
+			const project: Project = {
+				projectId: "proj-1",
+				name: "Test Project",
+				environments: [
+					{
+						environmentId: "env-prod",
+						name: "production",
+						isDefault: true,
+					},
+					{
+						environmentId: "env-dev",
+						name: "development",
+						isDefault: false,
+					},
+					{
+						environmentId: "env-staging",
+						name: "staging",
+						isDefault: false,
+					},
+				],
+			};
+
+			const result = selectAccessibleEnvironment(project);
+
+			expect(result).not.toBeNull();
+			expect(result?.environmentId).toBe("env-prod");
+			expect(result?.isDefault).toBe(true);
+		});
+
+		it("should handle real-world scenario: user with only development access", () => {
+			// This simulates the exact bug we're fixing:
+			// User has access to development but not production (default)
+			// The filtered environments array only contains development
+			const project: Project = {
+				projectId: "proj-1",
+				name: "My Project",
+				environments: [
+					// Only development is accessible (production was filtered out)
+					{
+						environmentId: "env-dev-123",
+						name: "development",
+						isDefault: false,
+					},
+				],
+			};
+
+			const result = selectAccessibleEnvironment(project);
+
+			expect(result).not.toBeNull();
+			expect(result?.environmentId).toBe("env-dev-123");
+			expect(result?.name).toBe("development");
+			// Should not be null even though it's not the default
+		});
+	});
+
+	describe("Environment selection edge cases", () => {
+		it("should handle project with environments property as undefined", () => {
+			const project = {
+				projectId: "proj-1",
+				name: "Test Project",
+				environments: undefined,
+			} as unknown as Project;
+
+			const result = selectAccessibleEnvironment(project);
+
+			expect(result).toBeNull();
+		});
+
+		it("should handle project with null environments array", () => {
+			const project = {
+				projectId: "proj-1",
+				name: "Test Project",
+				environments: null,
+			} as unknown as Project;
+
+			const result = selectAccessibleEnvironment(project);
+
+			expect(result).toBeNull();
+		});
+	});
+});
diff --git a/apps/dokploy/components/dashboard/projects/show.tsx b/apps/dokploy/components/dashboard/projects/show.tsx
index a618a20aca..eb1ff5ab6e 100644
--- a/apps/dokploy/components/dashboard/projects/show.tsx
+++ b/apps/dokploy/components/dashboard/projects/show.tsx
@@ -288,9 +288,10 @@ export const ShowProjects = () => {
 												)
 												.some(Boolean);
 
-											const productionEnvironment = project?.environments.find(
-												(env) => env.isDefault,
-											);
+											// Find default environment from accessible environments, or fall back to first accessible environment
+											const accessibleEnvironment =
+												project?.environments.find((env) => env.isDefault) ||
+												project?.environments?.[0];
 
 											return (
 												<div
@@ -298,7 +299,7 @@ export const ShowProjects = () => {
 													className="w-full lg:max-w-md"
 												>
 													<Link
-														href={`/dashboard/project/${project.projectId}/environment/${productionEnvironment?.environmentId}`}
+														href={`/dashboard/project/${project.projectId}/environment/${accessibleEnvironment?.environmentId}`}
 													>
 														<Card className="group relative w-full h-full bg-transparent transition-colors hover:bg-border">
 															{haveServicesWithDomains ? (
diff --git a/apps/dokploy/components/dashboard/search-command.tsx b/apps/dokploy/components/dashboard/search-command.tsx
index d53fe0037a..6fd7989553 100644
--- a/apps/dokploy/components/dashboard/search-command.tsx
+++ b/apps/dokploy/components/dashboard/search-command.tsx
@@ -89,7 +89,7 @@ export const SearchCommand = () => {
 					<CommandGroup heading={"Projects"}>
 						<CommandList>
 							{data?.map((project) => {
-								// Find default environment, or fall back to first environment
+								// Find default environment from accessible environments, or fall back to first accessible environment
 								const defaultEnvironment =
 									project.environments.find(
 										(environment) => environment.isDefault,
diff --git a/apps/dokploy/pages/dashboard/project/[projectId]/environment/[environmentId].tsx b/apps/dokploy/pages/dashboard/project/[projectId]/environment/[environmentId].tsx
index dcc34cec22..33b037e5f3 100644
--- a/apps/dokploy/pages/dashboard/project/[projectId]/environment/[environmentId].tsx
+++ b/apps/dokploy/pages/dashboard/project/[projectId]/environment/[environmentId].tsx
@@ -1621,9 +1621,39 @@ export async function getServerSideProps(
 				projectId: params.projectId,
 			});
 
-			await helpers.environment.one.fetch({
-				environmentId: params.environmentId,
-			});
+			// Try to fetch the requested environment
+			try {
+				await helpers.environment.one.fetch({
+					environmentId: params.environmentId,
+				});
+			} catch (error) {
+				// If user doesn't have access to requested environment, redirect to accessible one
+				const accessibleEnvironments =
+					await helpers.environment.byProjectId.fetch({
+						projectId: params.projectId,
+					});
+
+				if (accessibleEnvironments.length > 0) {
+					// Try to find default, otherwise use first accessible
+					const targetEnv =
+						accessibleEnvironments.find((env) => env.isDefault) ||
+						accessibleEnvironments[0];
+
+					return {
+						redirect: {
+							permanent: false,
+							destination: `/dashboard/project/${params.projectId}/environment/${targetEnv.environmentId}`,
+						},
+					};
+				}
+				// No accessible environments, redirect to home
+				return {
+					redirect: {
+						permanent: false,
+						destination: "/",
+					},
+				};
+			}
 
 			await helpers.environment.byProjectId.fetch({
 				projectId: params.projectId,